In the paper by Maja Stulemeijer and colleagues the drop-out rate from treatment in the group allocated to immediate cognitive behaviour therapy was given as 19% (BMJ 2005;330:14-7, 1 Jan). This should have been 17% (6/35). Also, in the footnote to table 4 (full version only) the cut-off score on the fatigue was given as ≥35.7. As the paper indicates that patients were considered to be improved if the score was < 35.7, reflecting less fatigue, the cut off in the footnote would be better presented as < 35.7 to match the presentation in the text.